to look out= watch out

to look out the window or to look through the window

to look up a word online

to look up to someone/ ex.  to look up to a great professor

to look down on lazy professors

to look for your keys or to look for love

to look over homework - to check it briefly

to look after a child, a pet, a grandparent

to look someone in the eye - Look me in the eye to see if you are telling the truth. (parent to the child)

to look in on someone - to check if they are o.k. 

to look at a painting, a photograph etc. 

Online Exercises for you to do: 

 https://www.englisch-hilfen.de/en/exercises/structures/phrasal_verbs_look.htm